2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
7 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
8 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
9 * Copyright (C) Darryl Miles G7LED (dlm@g7led.demon.co.uk)
10 * Copyright (C) Steven Whitehouse GW7RRM (stevew@acm.org)
11 * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
12 * Copyright (C) Hans-Joachim Hetscher DD8NE (dd8ne@bnv-bamberg.de)
13 * Copyright (C) Hans Alblas PE1AYX (hans@esrac.ele.tue.nl)
14 * Copyright (C) Frederic Rible F1OAT (frible@teaser.fr)
16 #include <linux/capability.h>
17 #include <linux/module.h>
18 #include <linux/errno.h>
19 #include <linux/types.h>
20 #include <linux/socket.h>
22 #include <linux/kernel.h>
23 #include <linux/sched.h>
24 #include <linux/timer.h>
25 #include <linux/string.h>
26 #include <linux/sockios.h>
27 #include <linux/net.h>
28 #include <linux/slab.h>
30 #include <linux/inet.h>
31 #include <linux/netdevice.h>
32 #include <linux/if_arp.h>
33 #include <linux/skbuff.h>
35 #include <asm/uaccess.h>
36 #include <asm/system.h>
37 #include <linux/fcntl.h>
38 #include <linux/termios.h> /* For TIOCINQ/OUTQ */
40 #include <linux/interrupt.h>
41 #include <linux/notifier.h>
42 #include <linux/proc_fs.h>
43 #include <linux/stat.h>
44 #include <linux/netfilter.h>
45 #include <linux/sysctl.h>
46 #include <linux/init.h>
47 #include <linux/spinlock.h>
48 #include <net/net_namespace.h>
49 #include <net/tcp_states.h>
55 HLIST_HEAD(ax25_list);
56 DEFINE_SPINLOCK(ax25_list_lock);
58 static const struct proto_ops ax25_proto_ops;
60 static void ax25_free_sock(struct sock *sk)
62 ax25_cb_put(ax25_sk(sk));
66 * Socket removal during an interrupt is now safe.
68 static void ax25_cb_del(ax25_cb *ax25)
70 if (!hlist_unhashed(&ax25->ax25_node)) {
71 spin_lock_bh(&ax25_list_lock);
72 hlist_del_init(&ax25->ax25_node);
73 spin_unlock_bh(&ax25_list_lock);
79 * Kill all bound sockets on a dropped device.
81 static void ax25_kill_by_device(struct net_device *dev)
85 struct hlist_node *node;
87 if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
90 spin_lock_bh(&ax25_list_lock);
92 ax25_for_each(s, node, &ax25_list) {
93 if (s->ax25_dev == ax25_dev) {
95 spin_unlock_bh(&ax25_list_lock);
96 ax25_disconnect(s, ENETUNREACH);
97 spin_lock_bh(&ax25_list_lock);
99 /* The entry could have been deleted from the
100 * list meanwhile and thus the next pointer is
101 * no longer valid. Play it safe and restart
102 * the scan. Forward progress is ensured
103 * because we set s->ax25_dev to NULL and we
104 * are never passed a NULL 'dev' argument.
109 spin_unlock_bh(&ax25_list_lock);
113 * Handle device status changes.
115 static int ax25_device_event(struct notifier_block *this, unsigned long event,
118 struct net_device *dev = (struct net_device *)ptr;
120 if (!net_eq(dev_net(dev), &init_net))
123 /* Reject non AX.25 devices */
124 if (dev->type != ARPHRD_AX25)
129 ax25_dev_device_up(dev);
132 ax25_kill_by_device(dev);
133 ax25_rt_device_down(dev);
134 ax25_dev_device_down(dev);
144 * Add a socket to the bound sockets list.
146 void ax25_cb_add(ax25_cb *ax25)
148 spin_lock_bh(&ax25_list_lock);
150 hlist_add_head(&ax25->ax25_node, &ax25_list);
151 spin_unlock_bh(&ax25_list_lock);
155 * Find a socket that wants to accept the SABM we have just
158 struct sock *ax25_find_listener(ax25_address *addr, int digi,
159 struct net_device *dev, int type)
162 struct hlist_node *node;
164 spin_lock(&ax25_list_lock);
165 ax25_for_each(s, node, &ax25_list) {
166 if ((s->iamdigi && !digi) || (!s->iamdigi && digi))
168 if (s->sk && !ax25cmp(&s->source_addr, addr) &&
169 s->sk->sk_type == type && s->sk->sk_state == TCP_LISTEN) {
170 /* If device is null we match any device */
171 if (s->ax25_dev == NULL || s->ax25_dev->dev == dev) {
173 spin_unlock(&ax25_list_lock);
178 spin_unlock(&ax25_list_lock);
184 * Find an AX.25 socket given both ends.
186 struct sock *ax25_get_socket(ax25_address *my_addr, ax25_address *dest_addr,
189 struct sock *sk = NULL;
191 struct hlist_node *node;
193 spin_lock(&ax25_list_lock);
194 ax25_for_each(s, node, &ax25_list) {
195 if (s->sk && !ax25cmp(&s->source_addr, my_addr) &&
196 !ax25cmp(&s->dest_addr, dest_addr) &&
197 s->sk->sk_type == type) {
204 spin_unlock(&ax25_list_lock);
210 * Find an AX.25 control block given both ends. It will only pick up
211 * floating AX.25 control blocks or non Raw socket bound control blocks.
213 ax25_cb *ax25_find_cb(ax25_address *src_addr, ax25_address *dest_addr,
214 ax25_digi *digi, struct net_device *dev)
217 struct hlist_node *node;
219 spin_lock_bh(&ax25_list_lock);
220 ax25_for_each(s, node, &ax25_list) {
221 if (s->sk && s->sk->sk_type != SOCK_SEQPACKET)
223 if (s->ax25_dev == NULL)
225 if (ax25cmp(&s->source_addr, src_addr) == 0 && ax25cmp(&s->dest_addr, dest_addr) == 0 && s->ax25_dev->dev == dev) {
226 if (digi != NULL && digi->ndigi != 0) {
227 if (s->digipeat == NULL)
229 if (ax25digicmp(s->digipeat, digi) != 0)
232 if (s->digipeat != NULL && s->digipeat->ndigi != 0)
236 spin_unlock_bh(&ax25_list_lock);
241 spin_unlock_bh(&ax25_list_lock);
246 EXPORT_SYMBOL(ax25_find_cb);
248 void ax25_send_to_raw(ax25_address *addr, struct sk_buff *skb, int proto)
251 struct sk_buff *copy;
252 struct hlist_node *node;
254 spin_lock(&ax25_list_lock);
255 ax25_for_each(s, node, &ax25_list) {
256 if (s->sk != NULL && ax25cmp(&s->source_addr, addr) == 0 &&
257 s->sk->sk_type == SOCK_RAW &&
258 s->sk->sk_protocol == proto &&
259 s->ax25_dev->dev == skb->dev &&
260 atomic_read(&s->sk->sk_rmem_alloc) <= s->sk->sk_rcvbuf) {
261 if ((copy = skb_clone(skb, GFP_ATOMIC)) == NULL)
263 if (sock_queue_rcv_skb(s->sk, copy) != 0)
267 spin_unlock(&ax25_list_lock);
273 void ax25_destroy_socket(ax25_cb *);
276 * Handler for deferred kills.
278 static void ax25_destroy_timer(unsigned long data)
280 ax25_cb *ax25=(ax25_cb *)data;
287 ax25_destroy_socket(ax25);
293 * This is called from user mode and the timers. Thus it protects itself
294 * against interrupt users but doesn't worry about being called during
295 * work. Once it is removed from the queue no interrupt or bottom half
296 * will touch it and we are (fairly 8-) ) safe.
298 void ax25_destroy_socket(ax25_cb *ax25)
304 ax25_stop_heartbeat(ax25);
305 ax25_stop_t1timer(ax25);
306 ax25_stop_t2timer(ax25);
307 ax25_stop_t3timer(ax25);
308 ax25_stop_idletimer(ax25);
310 ax25_clear_queues(ax25); /* Flush the queues */
312 if (ax25->sk != NULL) {
313 while ((skb = skb_dequeue(&ax25->sk->sk_receive_queue)) != NULL) {
314 if (skb->sk != ax25->sk) {
315 /* A pending connection */
316 ax25_cb *sax25 = ax25_sk(skb->sk);
318 /* Queue the unaccepted socket for death */
319 sock_orphan(skb->sk);
321 /* 9A4GL: hack to release unaccepted sockets */
322 skb->sk->sk_state = TCP_LISTEN;
324 ax25_start_heartbeat(sax25);
325 sax25->state = AX25_STATE_0;
330 skb_queue_purge(&ax25->sk->sk_write_queue);
333 if (ax25->sk != NULL) {
334 if (sk_has_allocations(ax25->sk)) {
335 /* Defer: outstanding buffers */
336 setup_timer(&ax25->dtimer, ax25_destroy_timer,
337 (unsigned long)ax25);
338 ax25->dtimer.expires = jiffies + 2 * HZ;
339 add_timer(&ax25->dtimer);
341 struct sock *sk=ax25->sk;
351 * dl1bke 960311: set parameters for existing AX.25 connections,
352 * includes a KILL command to abort any connection.
353 * VERY useful for debugging ;-)
355 static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg)
357 struct ax25_ctl_struct ax25_ctl;
364 if (copy_from_user(&ax25_ctl, arg, sizeof(ax25_ctl)))
367 if ((ax25_dev = ax25_addr_ax25dev(&ax25_ctl.port_addr)) == NULL)
370 if (ax25_ctl.digi_count > AX25_MAX_DIGIS)
373 if (ax25_ctl.arg > ULONG_MAX / HZ && ax25_ctl.cmd != AX25_KILL)
376 digi.ndigi = ax25_ctl.digi_count;
377 for (k = 0; k < digi.ndigi; k++)
378 digi.calls[k] = ax25_ctl.digi_addr[k];
380 if ((ax25 = ax25_find_cb(&ax25_ctl.source_addr, &ax25_ctl.dest_addr, &digi, ax25_dev->dev)) == NULL)
383 switch (ax25_ctl.cmd) {
385 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
386 #ifdef CONFIG_AX25_DAMA_SLAVE
387 if (ax25_dev->dama.slave && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE)
390 ax25_disconnect(ax25, ENETRESET);
394 if (ax25->modulus == AX25_MODULUS) {
395 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7)
398 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63)
401 ax25->window = ax25_ctl.arg;
405 if (ax25_ctl.arg < 1)
407 ax25->rtt = (ax25_ctl.arg * HZ) / 2;
408 ax25->t1 = ax25_ctl.arg * HZ;
412 if (ax25_ctl.arg < 1)
414 ax25->t2 = ax25_ctl.arg * HZ;
418 if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31)
421 ax25->n2 = ax25_ctl.arg;
425 ax25->t3 = ax25_ctl.arg * HZ;
429 ax25->idle = ax25_ctl.arg * 60 * HZ;
433 if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535)
435 ax25->paclen = ax25_ctl.arg;
451 static void ax25_fillin_cb_from_dev(ax25_cb *ax25, ax25_dev *ax25_dev)
453 ax25->rtt = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]) / 2;
454 ax25->t1 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]);
455 ax25->t2 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T2]);
456 ax25->t3 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T3]);
457 ax25->n2 = ax25_dev->values[AX25_VALUES_N2];
458 ax25->paclen = ax25_dev->values[AX25_VALUES_PACLEN];
459 ax25->idle = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_IDLE]);
460 ax25->backoff = ax25_dev->values[AX25_VALUES_BACKOFF];
462 if (ax25_dev->values[AX25_VALUES_AXDEFMODE]) {
463 ax25->modulus = AX25_EMODULUS;
464 ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW];
466 ax25->modulus = AX25_MODULUS;
467 ax25->window = ax25_dev->values[AX25_VALUES_WINDOW];
472 * Fill in a created AX.25 created control block with the default
473 * values for a particular device.
475 void ax25_fillin_cb(ax25_cb *ax25, ax25_dev *ax25_dev)
477 ax25->ax25_dev = ax25_dev;
479 if (ax25->ax25_dev != NULL) {
480 ax25_fillin_cb_from_dev(ax25, ax25_dev);
485 * No device, use kernel / AX.25 spec default values
487 ax25->rtt = msecs_to_jiffies(AX25_DEF_T1) / 2;
488 ax25->t1 = msecs_to_jiffies(AX25_DEF_T1);
489 ax25->t2 = msecs_to_jiffies(AX25_DEF_T2);
490 ax25->t3 = msecs_to_jiffies(AX25_DEF_T3);
491 ax25->n2 = AX25_DEF_N2;
492 ax25->paclen = AX25_DEF_PACLEN;
493 ax25->idle = msecs_to_jiffies(AX25_DEF_IDLE);
494 ax25->backoff = AX25_DEF_BACKOFF;
496 if (AX25_DEF_AXDEFMODE) {
497 ax25->modulus = AX25_EMODULUS;
498 ax25->window = AX25_DEF_EWINDOW;
500 ax25->modulus = AX25_MODULUS;
501 ax25->window = AX25_DEF_WINDOW;
506 * Create an empty AX.25 control block.
508 ax25_cb *ax25_create_cb(void)
512 if ((ax25 = kzalloc(sizeof(*ax25), GFP_ATOMIC)) == NULL)
515 atomic_set(&ax25->refcount, 1);
517 skb_queue_head_init(&ax25->write_queue);
518 skb_queue_head_init(&ax25->frag_queue);
519 skb_queue_head_init(&ax25->ack_queue);
520 skb_queue_head_init(&ax25->reseq_queue);
522 ax25_setup_timers(ax25);
524 ax25_fillin_cb(ax25, NULL);
526 ax25->state = AX25_STATE_0;
532 * Handling for system calls applied via the various interfaces to an
536 static int ax25_setsockopt(struct socket *sock, int level, int optname,
537 char __user *optval, unsigned int optlen)
539 struct sock *sk = sock->sk;
541 struct net_device *dev;
542 char devname[IFNAMSIZ];
545 if (level != SOL_AX25)
548 if (optlen < sizeof(int))
551 if (get_user(opt, (int __user *)optval))
559 if (ax25->modulus == AX25_MODULUS) {
560 if (opt < 1 || opt > 7) {
565 if (opt < 1 || opt > 63) {
578 ax25->rtt = (opt * HZ) >> 1;
591 if (opt < 1 || opt > 31) {
611 ax25->idle = opt * 60 * HZ;
615 if (opt < 0 || opt > 2) {
623 ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS;
627 ax25->pidincl = opt ? 1 : 0;
631 ax25->iamdigi = opt ? 1 : 0;
635 if (opt < 16 || opt > 65535) {
642 case SO_BINDTODEVICE:
643 if (optlen > IFNAMSIZ)
646 if (copy_from_user(devname, optval, optlen)) {
651 if (sk->sk_type == SOCK_SEQPACKET &&
652 (sock->state != SS_UNCONNECTED ||
653 sk->sk_state == TCP_LISTEN)) {
654 res = -EADDRNOTAVAIL;
658 dev = dev_get_by_name(&init_net, devname);
664 ax25->ax25_dev = ax25_dev_ax25dev(dev);
665 ax25_fillin_cb(ax25, ax25->ax25_dev);
677 static int ax25_getsockopt(struct socket *sock, int level, int optname,
678 char __user *optval, int __user *optlen)
680 struct sock *sk = sock->sk;
682 struct ax25_dev *ax25_dev;
683 char devname[IFNAMSIZ];
688 if (level != SOL_AX25)
691 if (get_user(maxlen, optlen))
697 valptr = (void *) &val;
698 length = min_t(unsigned int, maxlen, sizeof(int));
725 val = ax25->idle / (60 * HZ);
733 val = (ax25->modulus == AX25_EMODULUS);
748 case SO_BINDTODEVICE:
749 ax25_dev = ax25->ax25_dev;
751 if (ax25_dev != NULL && ax25_dev->dev != NULL) {
752 strlcpy(devname, ax25_dev->dev->name, sizeof(devname));
753 length = strlen(devname) + 1;
759 valptr = (void *) devname;
768 if (put_user(length, optlen))
771 return copy_to_user(optval, valptr, length) ? -EFAULT : 0;
774 static int ax25_listen(struct socket *sock, int backlog)
776 struct sock *sk = sock->sk;
780 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_LISTEN) {
781 sk->sk_max_ack_backlog = backlog;
782 sk->sk_state = TCP_LISTEN;
794 * XXX: when creating ax25_sock we should update the .obj_size setting
797 static struct proto ax25_proto = {
799 .owner = THIS_MODULE,
800 .obj_size = sizeof(struct sock),
803 static int ax25_create(struct net *net, struct socket *sock, int protocol,
809 if (!net_eq(net, &init_net))
810 return -EAFNOSUPPORT;
812 switch (sock->type) {
814 if (protocol == 0 || protocol == PF_AX25)
815 protocol = AX25_P_TEXT;
821 case PF_AX25: /* For CLX */
822 protocol = AX25_P_TEXT;
835 return -ESOCKTNOSUPPORT;
836 #ifdef CONFIG_NETROM_MODULE
838 if (ax25_protocol_is_registered(AX25_P_NETROM))
839 return -ESOCKTNOSUPPORT;
841 #ifdef CONFIG_ROSE_MODULE
843 if (ax25_protocol_is_registered(AX25_P_ROSE))
844 return -ESOCKTNOSUPPORT;
854 return -ESOCKTNOSUPPORT;
857 sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto);
861 ax25 = sk->sk_protinfo = ax25_create_cb();
867 sock_init_data(sock, sk);
869 sk->sk_destruct = ax25_free_sock;
870 sock->ops = &ax25_proto_ops;
871 sk->sk_protocol = protocol;
878 struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev)
881 ax25_cb *ax25, *oax25;
883 sk = sk_alloc(sock_net(osk), PF_AX25, GFP_ATOMIC, osk->sk_prot);
887 if ((ax25 = ax25_create_cb()) == NULL) {
892 switch (osk->sk_type) {
903 sock_init_data(NULL, sk);
905 sk->sk_type = osk->sk_type;
906 sk->sk_priority = osk->sk_priority;
907 sk->sk_protocol = osk->sk_protocol;
908 sk->sk_rcvbuf = osk->sk_rcvbuf;
909 sk->sk_sndbuf = osk->sk_sndbuf;
910 sk->sk_state = TCP_ESTABLISHED;
911 sock_copy_flags(sk, osk);
913 oax25 = ax25_sk(osk);
915 ax25->modulus = oax25->modulus;
916 ax25->backoff = oax25->backoff;
917 ax25->pidincl = oax25->pidincl;
918 ax25->iamdigi = oax25->iamdigi;
919 ax25->rtt = oax25->rtt;
920 ax25->t1 = oax25->t1;
921 ax25->t2 = oax25->t2;
922 ax25->t3 = oax25->t3;
923 ax25->n2 = oax25->n2;
924 ax25->idle = oax25->idle;
925 ax25->paclen = oax25->paclen;
926 ax25->window = oax25->window;
928 ax25->ax25_dev = ax25_dev;
929 ax25->source_addr = oax25->source_addr;
931 if (oax25->digipeat != NULL) {
932 ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi),
934 if (ax25->digipeat == NULL) {
941 sk->sk_protinfo = ax25;
942 sk->sk_destruct = ax25_free_sock;
948 static int ax25_release(struct socket *sock)
950 struct sock *sk = sock->sk;
961 if (sk->sk_type == SOCK_SEQPACKET) {
962 switch (ax25->state) {
965 ax25_disconnect(ax25, 0);
967 ax25_destroy_socket(ax25);
972 ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
974 ax25_disconnect(ax25, 0);
976 ax25_destroy_socket(ax25);
981 ax25_clear_queues(ax25);
984 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
985 case AX25_PROTO_STD_SIMPLEX:
986 case AX25_PROTO_STD_DUPLEX:
987 ax25_send_control(ax25,
991 ax25_stop_t2timer(ax25);
992 ax25_stop_t3timer(ax25);
993 ax25_stop_idletimer(ax25);
995 #ifdef CONFIG_AX25_DAMA_SLAVE
996 case AX25_PROTO_DAMA_SLAVE:
997 ax25_stop_t3timer(ax25);
998 ax25_stop_idletimer(ax25);
1002 ax25_calculate_t1(ax25);
1003 ax25_start_t1timer(ax25);
1004 ax25->state = AX25_STATE_2;
1005 sk->sk_state = TCP_CLOSE;
1006 sk->sk_shutdown |= SEND_SHUTDOWN;
1007 sk->sk_state_change(sk);
1008 sock_set_flag(sk, SOCK_DESTROY);
1015 sk->sk_state = TCP_CLOSE;
1016 sk->sk_shutdown |= SEND_SHUTDOWN;
1017 sk->sk_state_change(sk);
1018 ax25_destroy_socket(ax25);
1029 * We support a funny extension here so you can (as root) give any callsign
1030 * digipeated via a local address as source. This hack is obsolete now
1031 * that we've implemented support for SO_BINDTODEVICE. It is however small
1032 * and trivially backward compatible.
1034 static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
1036 struct sock *sk = sock->sk;
1037 struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
1038 ax25_dev *ax25_dev = NULL;
1039 ax25_uid_assoc *user;
1044 if (addr_len != sizeof(struct sockaddr_ax25) &&
1045 addr_len != sizeof(struct full_sockaddr_ax25))
1046 /* support for old structure may go away some time
1047 * ax25_bind(): uses old (6 digipeater) socket structure.
1049 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1050 (addr_len > sizeof(struct full_sockaddr_ax25)))
1053 if (addr->fsa_ax25.sax25_family != AF_AX25)
1056 user = ax25_findbyuid(current_euid());
1061 if (ax25_uid_policy && !capable(CAP_NET_ADMIN))
1064 call = addr->fsa_ax25.sax25_call;
1070 if (!sock_flag(sk, SOCK_ZAPPED)) {
1075 ax25->source_addr = call;
1078 * User already set interface with SO_BINDTODEVICE
1080 if (ax25->ax25_dev != NULL)
1083 if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) {
1084 if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 &&
1085 (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) {
1086 err = -EADDRNOTAVAIL;
1090 if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) {
1091 err = -EADDRNOTAVAIL;
1096 if (ax25_dev != NULL)
1097 ax25_fillin_cb(ax25, ax25_dev);
1101 sock_reset_flag(sk, SOCK_ZAPPED);
1110 * FIXME: nonblock behaviour looks like it may have a bug.
1112 static int __must_check ax25_connect(struct socket *sock,
1113 struct sockaddr *uaddr, int addr_len, int flags)
1115 struct sock *sk = sock->sk;
1116 ax25_cb *ax25 = ax25_sk(sk), *ax25t;
1117 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1118 ax25_digi *digi = NULL;
1119 int ct = 0, err = 0;
1122 * some sanity checks. code further down depends on this
1125 if (addr_len == sizeof(struct sockaddr_ax25))
1126 /* support for this will go away in early 2.5.x
1127 * ax25_connect(): uses obsolete socket structure
1130 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1131 /* support for old structure may go away some time
1132 * ax25_connect(): uses old (6 digipeater) socket structure.
1134 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1135 (addr_len > sizeof(struct full_sockaddr_ax25)))
1139 if (fsa->fsa_ax25.sax25_family != AF_AX25)
1144 /* deal with restarts */
1145 if (sock->state == SS_CONNECTING) {
1146 switch (sk->sk_state) {
1147 case TCP_SYN_SENT: /* still trying */
1151 case TCP_ESTABLISHED: /* connection established */
1152 sock->state = SS_CONNECTED;
1155 case TCP_CLOSE: /* connection refused */
1156 sock->state = SS_UNCONNECTED;
1157 err = -ECONNREFUSED;
1162 if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) {
1163 err = -EISCONN; /* No reconnect on a seqpacket socket */
1167 sk->sk_state = TCP_CLOSE;
1168 sock->state = SS_UNCONNECTED;
1170 kfree(ax25->digipeat);
1171 ax25->digipeat = NULL;
1174 * Handle digi-peaters to be used.
1176 if (addr_len > sizeof(struct sockaddr_ax25) &&
1177 fsa->fsa_ax25.sax25_ndigis != 0) {
1178 /* Valid number of digipeaters ? */
1179 if (fsa->fsa_ax25.sax25_ndigis < 1 || fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS) {
1184 if ((digi = kmalloc(sizeof(ax25_digi), GFP_KERNEL)) == NULL) {
1189 digi->ndigi = fsa->fsa_ax25.sax25_ndigis;
1190 digi->lastrepeat = -1;
1192 while (ct < fsa->fsa_ax25.sax25_ndigis) {
1193 if ((fsa->fsa_digipeater[ct].ax25_call[6] &
1194 AX25_HBIT) && ax25->iamdigi) {
1195 digi->repeated[ct] = 1;
1196 digi->lastrepeat = ct;
1198 digi->repeated[ct] = 0;
1200 digi->calls[ct] = fsa->fsa_digipeater[ct];
1206 * Must bind first - autobinding in this may or may not work. If
1207 * the socket is already bound, check to see if the device has
1208 * been filled in, error if it hasn't.
1210 if (sock_flag(sk, SOCK_ZAPPED)) {
1211 /* check if we can remove this feature. It is broken. */
1212 printk(KERN_WARNING "ax25_connect(): %s uses autobind, please contact jreuter@yaina.de\n",
1214 if ((err = ax25_rt_autobind(ax25, &fsa->fsa_ax25.sax25_call)) < 0) {
1219 ax25_fillin_cb(ax25, ax25->ax25_dev);
1222 if (ax25->ax25_dev == NULL) {
1224 err = -EHOSTUNREACH;
1229 if (sk->sk_type == SOCK_SEQPACKET &&
1230 (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi,
1231 ax25->ax25_dev->dev))) {
1233 err = -EADDRINUSE; /* Already such a connection */
1238 ax25->dest_addr = fsa->fsa_ax25.sax25_call;
1239 ax25->digipeat = digi;
1241 /* First the easy one */
1242 if (sk->sk_type != SOCK_SEQPACKET) {
1243 sock->state = SS_CONNECTED;
1244 sk->sk_state = TCP_ESTABLISHED;
1248 /* Move to connecting socket, ax.25 lapb WAIT_UA.. */
1249 sock->state = SS_CONNECTING;
1250 sk->sk_state = TCP_SYN_SENT;
1252 switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
1253 case AX25_PROTO_STD_SIMPLEX:
1254 case AX25_PROTO_STD_DUPLEX:
1255 ax25_std_establish_data_link(ax25);
1258 #ifdef CONFIG_AX25_DAMA_SLAVE
1259 case AX25_PROTO_DAMA_SLAVE:
1260 ax25->modulus = AX25_MODULUS;
1261 ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
1262 if (ax25->ax25_dev->dama.slave)
1263 ax25_ds_establish_data_link(ax25);
1265 ax25_std_establish_data_link(ax25);
1270 ax25->state = AX25_STATE_1;
1272 ax25_start_heartbeat(ax25);
1275 if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
1280 if (sk->sk_state == TCP_SYN_SENT) {
1284 prepare_to_wait(sk_sleep(sk), &wait,
1285 TASK_INTERRUPTIBLE);
1286 if (sk->sk_state != TCP_SYN_SENT)
1288 if (!signal_pending(current)) {
1297 finish_wait(sk_sleep(sk), &wait);
1303 if (sk->sk_state != TCP_ESTABLISHED) {
1304 /* Not in ABM, not in WAIT_UA -> failed */
1305 sock->state = SS_UNCONNECTED;
1306 err = sock_error(sk); /* Always set at this point */
1310 sock->state = SS_CONNECTED;
1319 static int ax25_accept(struct socket *sock, struct socket *newsock, int flags)
1321 struct sk_buff *skb;
1327 if (sock->state != SS_UNCONNECTED)
1330 if ((sk = sock->sk) == NULL)
1334 if (sk->sk_type != SOCK_SEQPACKET) {
1339 if (sk->sk_state != TCP_LISTEN) {
1345 * The read queue this time is holding sockets ready to use
1346 * hooked into the SABM we saved
1349 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1350 skb = skb_dequeue(&sk->sk_receive_queue);
1354 if (flags & O_NONBLOCK) {
1358 if (!signal_pending(current)) {
1367 finish_wait(sk_sleep(sk), &wait);
1373 sock_graft(newsk, newsock);
1375 /* Now attach up the new socket */
1377 sk->sk_ack_backlog--;
1378 newsock->state = SS_CONNECTED;
1386 static int ax25_getname(struct socket *sock, struct sockaddr *uaddr,
1387 int *uaddr_len, int peer)
1389 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
1390 struct sock *sk = sock->sk;
1391 unsigned char ndigi, i;
1395 memset(fsa, 0, sizeof(fsa));
1400 if (sk->sk_state != TCP_ESTABLISHED) {
1405 fsa->fsa_ax25.sax25_family = AF_AX25;
1406 fsa->fsa_ax25.sax25_call = ax25->dest_addr;
1408 if (ax25->digipeat != NULL) {
1409 ndigi = ax25->digipeat->ndigi;
1410 fsa->fsa_ax25.sax25_ndigis = ndigi;
1411 for (i = 0; i < ndigi; i++)
1412 fsa->fsa_digipeater[i] =
1413 ax25->digipeat->calls[i];
1416 fsa->fsa_ax25.sax25_family = AF_AX25;
1417 fsa->fsa_ax25.sax25_call = ax25->source_addr;
1418 fsa->fsa_ax25.sax25_ndigis = 1;
1419 if (ax25->ax25_dev != NULL) {
1420 memcpy(&fsa->fsa_digipeater[0],
1421 ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN);
1423 fsa->fsa_digipeater[0] = null_ax25_address;
1426 *uaddr_len = sizeof (struct full_sockaddr_ax25);
1434 static int ax25_sendmsg(struct kiocb *iocb, struct socket *sock,
1435 struct msghdr *msg, size_t len)
1437 struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name;
1438 struct sock *sk = sock->sk;
1439 struct sockaddr_ax25 sax;
1440 struct sk_buff *skb;
1441 ax25_digi dtmp, *dp;
1444 int lv, err, addr_len = msg->msg_namelen;
1446 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
1452 if (sock_flag(sk, SOCK_ZAPPED)) {
1453 err = -EADDRNOTAVAIL;
1457 if (sk->sk_shutdown & SEND_SHUTDOWN) {
1458 send_sig(SIGPIPE, current, 0);
1463 if (ax25->ax25_dev == NULL) {
1468 if (len > ax25->ax25_dev->dev->mtu) {
1474 if (usax->sax25_family != AF_AX25) {
1479 if (addr_len == sizeof(struct sockaddr_ax25))
1480 /* ax25_sendmsg(): uses obsolete socket structure */
1482 else if (addr_len != sizeof(struct full_sockaddr_ax25))
1483 /* support for old structure may go away some time
1484 * ax25_sendmsg(): uses old (6 digipeater)
1487 if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
1488 (addr_len > sizeof(struct full_sockaddr_ax25))) {
1494 if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) {
1496 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax;
1498 /* Valid number of digipeaters ? */
1499 if (usax->sax25_ndigis < 1 || usax->sax25_ndigis > AX25_MAX_DIGIS) {
1504 dtmp.ndigi = usax->sax25_ndigis;
1506 while (ct < usax->sax25_ndigis) {
1507 dtmp.repeated[ct] = 0;
1508 dtmp.calls[ct] = fsa->fsa_digipeater[ct];
1512 dtmp.lastrepeat = 0;
1516 if (sk->sk_type == SOCK_SEQPACKET &&
1517 ax25cmp(&ax25->dest_addr, &sax.sax25_call)) {
1521 if (usax->sax25_ndigis == 0)
1527 * FIXME: 1003.1g - if the socket is like this because
1528 * it has become closed (not started closed) and is VC
1529 * we ought to SIGPIPE, EPIPE
1531 if (sk->sk_state != TCP_ESTABLISHED) {
1535 sax.sax25_family = AF_AX25;
1536 sax.sax25_call = ax25->dest_addr;
1537 dp = ax25->digipeat;
1540 /* Build a packet */
1541 SOCK_DEBUG(sk, "AX.25: sendto: Addresses built. Building packet.\n");
1543 /* Assume the worst case */
1544 size = len + ax25->ax25_dev->dev->hard_header_len;
1546 skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT, &err);
1550 skb_reserve(skb, size - len);
1552 SOCK_DEBUG(sk, "AX.25: Appending user data\n");
1554 /* User data follows immediately after the AX.25 data */
1555 if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
1561 skb_reset_network_header(skb);
1563 /* Add the PID if one is not supplied by the user in the skb */
1565 *skb_push(skb, 1) = sk->sk_protocol;
1567 SOCK_DEBUG(sk, "AX.25: Transmitting buffer\n");
1569 if (sk->sk_type == SOCK_SEQPACKET) {
1570 /* Connected mode sockets go via the LAPB machine */
1571 if (sk->sk_state != TCP_ESTABLISHED) {
1577 /* Shove it onto the queue and kick */
1578 ax25_output(ax25, ax25->paclen, skb);
1584 skb_push(skb, 1 + ax25_addr_size(dp));
1586 SOCK_DEBUG(sk, "Building AX.25 Header (dp=%p).\n", dp);
1589 SOCK_DEBUG(sk, "Num digipeaters=%d\n", dp->ndigi);
1591 /* Build an AX.25 header */
1592 lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call,
1593 dp, AX25_COMMAND, AX25_MODULUS);
1595 SOCK_DEBUG(sk, "Built header (%d bytes)\n",lv);
1597 skb_set_transport_header(skb, lv);
1599 SOCK_DEBUG(sk, "base=%p pos=%p\n",
1600 skb->data, skb_transport_header(skb));
1602 *skb_transport_header(skb) = AX25_UI;
1604 /* Datagram frames go straight out of the door as UI */
1605 ax25_queue_xmit(skb, ax25->ax25_dev->dev);
1615 static int ax25_recvmsg(struct kiocb *iocb, struct socket *sock,
1616 struct msghdr *msg, size_t size, int flags)
1618 struct sock *sk = sock->sk;
1619 struct sk_buff *skb;
1625 * This works for seqpacket too. The receiver has ordered the
1626 * queue for us! We do one quick check first though
1628 if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) {
1633 /* Now we can treat all alike */
1634 skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
1635 flags & MSG_DONTWAIT, &err);
1639 if (!ax25_sk(sk)->pidincl)
1640 skb_pull(skb, 1); /* Remove PID */
1642 skb_reset_transport_header(skb);
1645 if (copied > size) {
1647 msg->msg_flags |= MSG_TRUNC;
1650 skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
1652 if (msg->msg_namelen != 0) {
1653 struct sockaddr_ax25 *sax = (struct sockaddr_ax25 *)msg->msg_name;
1656 const unsigned char *mac = skb_mac_header(skb);
1658 ax25_addr_parse(mac + 1, skb->data - mac - 1, &src, NULL,
1660 sax->sax25_family = AF_AX25;
1661 /* We set this correctly, even though we may not let the
1662 application know the digi calls further down (because it
1663 did NOT ask to know them). This could get political... **/
1664 sax->sax25_ndigis = digi.ndigi;
1665 sax->sax25_call = src;
1667 if (sax->sax25_ndigis != 0) {
1669 struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)sax;
1671 for (ct = 0; ct < digi.ndigi; ct++)
1672 fsa->fsa_digipeater[ct] = digi.calls[ct];
1674 msg->msg_namelen = sizeof(struct full_sockaddr_ax25);
1677 skb_free_datagram(sk, skb);
1686 static int ax25_shutdown(struct socket *sk, int how)
1688 /* FIXME - generate DM and RNR states */
1692 static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1694 struct sock *sk = sock->sk;
1695 void __user *argp = (void __user *)arg;
1703 amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
1706 res = put_user(amount, (int __user *)argp);
1711 struct sk_buff *skb;
1713 /* These two are safe on a single CPU system as only user tasks fiddle here */
1714 if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
1716 res = put_user(amount, (int __user *) argp);
1721 res = sock_get_timestamp(sk, argp);
1725 res = sock_get_timestampns(sk, argp);
1728 case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */
1729 case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */
1730 case SIOCAX25GETUID: {
1731 struct sockaddr_ax25 sax25;
1732 if (copy_from_user(&sax25, argp, sizeof(sax25))) {
1736 res = ax25_uid_ioctl(cmd, &sax25);
1740 case SIOCAX25NOUID: { /* Set the default policy (default/bar) */
1742 if (!capable(CAP_NET_ADMIN)) {
1746 if (get_user(amount, (long __user *)argp)) {
1750 if (amount > AX25_NOUID_BLOCK) {
1754 ax25_uid_policy = amount;
1762 if (!capable(CAP_NET_ADMIN)) {
1766 res = ax25_rt_ioctl(cmd, argp);
1769 case SIOCAX25CTLCON:
1770 if (!capable(CAP_NET_ADMIN)) {
1774 res = ax25_ctl_ioctl(cmd, argp);
1777 case SIOCAX25GETINFO:
1778 case SIOCAX25GETINFOOLD: {
1779 ax25_cb *ax25 = ax25_sk(sk);
1780 struct ax25_info_struct ax25_info;
1782 ax25_info.t1 = ax25->t1 / HZ;
1783 ax25_info.t2 = ax25->t2 / HZ;
1784 ax25_info.t3 = ax25->t3 / HZ;
1785 ax25_info.idle = ax25->idle / (60 * HZ);
1786 ax25_info.n2 = ax25->n2;
1787 ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ;
1788 ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ;
1789 ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ;
1790 ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ);
1791 ax25_info.n2count = ax25->n2count;
1792 ax25_info.state = ax25->state;
1793 ax25_info.rcv_q = sk_rmem_alloc_get(sk);
1794 ax25_info.snd_q = sk_wmem_alloc_get(sk);
1795 ax25_info.vs = ax25->vs;
1796 ax25_info.vr = ax25->vr;
1797 ax25_info.va = ax25->va;
1798 ax25_info.vs_max = ax25->vs; /* reserved */
1799 ax25_info.paclen = ax25->paclen;
1800 ax25_info.window = ax25->window;
1802 /* old structure? */
1803 if (cmd == SIOCAX25GETINFOOLD) {
1804 static int warned = 0;
1806 printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n",
1811 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) {
1816 if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) {
1825 case SIOCAX25ADDFWD:
1826 case SIOCAX25DELFWD: {
1827 struct ax25_fwd_struct ax25_fwd;
1828 if (!capable(CAP_NET_ADMIN)) {
1832 if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) {
1836 res = ax25_fwd_ioctl(cmd, &ax25_fwd);
1842 case SIOCGIFDSTADDR:
1843 case SIOCSIFDSTADDR:
1844 case SIOCGIFBRDADDR:
1845 case SIOCSIFBRDADDR:
1846 case SIOCGIFNETMASK:
1847 case SIOCSIFNETMASK:
1862 #ifdef CONFIG_PROC_FS
1864 static void *ax25_info_start(struct seq_file *seq, loff_t *pos)
1865 __acquires(ax25_list_lock)
1867 spin_lock_bh(&ax25_list_lock);
1868 return seq_hlist_start(&ax25_list, *pos);
1871 static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos)
1873 return seq_hlist_next(v, &ax25_list, pos);
1876 static void ax25_info_stop(struct seq_file *seq, void *v)
1877 __releases(ax25_list_lock)
1879 spin_unlock_bh(&ax25_list_lock);
1882 static int ax25_info_show(struct seq_file *seq, void *v)
1884 ax25_cb *ax25 = hlist_entry(v, struct ax25_cb, ax25_node);
1891 * magic dev src_addr dest_addr,digi1,digi2,.. st vs vr va t1 t1 t2 t2 t3 t3 idle idle n2 n2 rtt window paclen Snd-Q Rcv-Q inode
1894 seq_printf(seq, "%8.8lx %s %s%s ",
1896 ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name,
1897 ax2asc(buf, &ax25->source_addr),
1898 ax25->iamdigi? "*":"");
1899 seq_printf(seq, "%s", ax2asc(buf, &ax25->dest_addr));
1901 for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) {
1902 seq_printf(seq, ",%s%s",
1903 ax2asc(buf, &ax25->digipeat->calls[k]),
1904 ax25->digipeat->repeated[k]? "*":"");
1907 seq_printf(seq, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d",
1909 ax25->vs, ax25->vr, ax25->va,
1910 ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ,
1911 ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ,
1912 ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ,
1913 ax25_display_timer(&ax25->idletimer) / (60 * HZ),
1914 ax25->idle / (60 * HZ),
1915 ax25->n2count, ax25->n2,
1920 if (ax25->sk != NULL) {
1921 seq_printf(seq, " %d %d %lu\n",
1922 sk_wmem_alloc_get(ax25->sk),
1923 sk_rmem_alloc_get(ax25->sk),
1924 sock_i_ino(ax25->sk));
1926 seq_puts(seq, " * * *\n");
1931 static const struct seq_operations ax25_info_seqops = {
1932 .start = ax25_info_start,
1933 .next = ax25_info_next,
1934 .stop = ax25_info_stop,
1935 .show = ax25_info_show,
1938 static int ax25_info_open(struct inode *inode, struct file *file)
1940 return seq_open(file, &ax25_info_seqops);
1943 static const struct file_operations ax25_info_fops = {
1944 .owner = THIS_MODULE,
1945 .open = ax25_info_open,
1947 .llseek = seq_lseek,
1948 .release = seq_release,
1953 static const struct net_proto_family ax25_family_ops = {
1955 .create = ax25_create,
1956 .owner = THIS_MODULE,
1959 static const struct proto_ops ax25_proto_ops = {
1961 .owner = THIS_MODULE,
1962 .release = ax25_release,
1964 .connect = ax25_connect,
1965 .socketpair = sock_no_socketpair,
1966 .accept = ax25_accept,
1967 .getname = ax25_getname,
1968 .poll = datagram_poll,
1969 .ioctl = ax25_ioctl,
1970 .listen = ax25_listen,
1971 .shutdown = ax25_shutdown,
1972 .setsockopt = ax25_setsockopt,
1973 .getsockopt = ax25_getsockopt,
1974 .sendmsg = ax25_sendmsg,
1975 .recvmsg = ax25_recvmsg,
1976 .mmap = sock_no_mmap,
1977 .sendpage = sock_no_sendpage,
1981 * Called by socket.c on kernel start up
1983 static struct packet_type ax25_packet_type __read_mostly = {
1984 .type = cpu_to_be16(ETH_P_AX25),
1985 .func = ax25_kiss_rcv,
1988 static struct notifier_block ax25_dev_notifier = {
1989 .notifier_call =ax25_device_event,
1992 static int __init ax25_init(void)
1994 int rc = proto_register(&ax25_proto, 0);
1999 sock_register(&ax25_family_ops);
2000 dev_add_pack(&ax25_packet_type);
2001 register_netdevice_notifier(&ax25_dev_notifier);
2002 ax25_register_sysctl();
2004 proc_net_fops_create(&init_net, "ax25_route", S_IRUGO, &ax25_route_fops);
2005 proc_net_fops_create(&init_net, "ax25", S_IRUGO, &ax25_info_fops);
2006 proc_net_fops_create(&init_net, "ax25_calls", S_IRUGO, &ax25_uid_fops);
2010 module_init(ax25_init);
2013 MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
2014 MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol");
2015 MODULE_LICENSE("GPL");
2016 MODULE_ALIAS_NETPROTO(PF_AX25);
2018 static void __exit ax25_exit(void)
2020 proc_net_remove(&init_net, "ax25_route");
2021 proc_net_remove(&init_net, "ax25");
2022 proc_net_remove(&init_net, "ax25_calls");
2027 ax25_unregister_sysctl();
2028 unregister_netdevice_notifier(&ax25_dev_notifier);
2030 dev_remove_pack(&ax25_packet_type);
2032 sock_unregister(PF_AX25);
2033 proto_unregister(&ax25_proto);
2035 module_exit(ax25_exit);